DP Mathematical Studies Questionbank

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Directly related questions

• 18M.2.sl.TZ2.3e: State a conclusion for this test. Justify your answer.
• 18M.2.sl.TZ2.3d.ii: For this test find the p-value.
• 18M.2.sl.TZ2.3d.i: For this test state the null hypothesis.
• 18M.2.sl.TZ2.3c: Given that P(W > k) = 0.225 , find the value of k.
• 18M.2.sl.TZ2.3b.ii: Find the value of q.
• 18M.2.sl.TZ2.3b.i: Sketch a normal curve to represent this probability.
• 18M.2.sl.TZ2.3a.ii: In a training session there are 40 basketball players. Find the expected number of players with...
• 18M.2.sl.TZ2.3a.i: Find the probability that a basketball player has a weight that is less than 61 kg.
• 18M.2.sl.TZ1.2h: Two flights are chosen at random from those which were slightly delayed. Find the probability...
• 18M.2.sl.TZ1.2f: Write down the probability that this flight arrived on time.
• 18M.2.sl.TZ1.2d.ii: Write down the associated p-value.
• 18M.2.sl.TZ1.2d.i: Write down the χ2 statistic.
• 18M.2.sl.TZ1.2a: State the alternative hypothesis.
• 18M.2.sl.TZ1.2b: Calculate the expected frequency of flights travelling at most 500 km and arriving slightly delayed.
• 17N.2.sl.TZ0.1g: State the result of the test. Give a reason for your answer.
• 17N.2.sl.TZ0.1f.ii: Write down the ${\chi ^2}$ statistic.
• 17N.2.sl.TZ0.1f.i: Write down the $p$-value for the test;
• 17N.2.sl.TZ0.1e.ii: Write down the number of degrees of freedom.
• 17N.2.sl.TZ0.1e.i: Write down the null hypothesis for this test;
• 17N.2.sl.TZ0.1d: Find the expected frequency of students choosing the Science category and obtaining 31 to 40...
• 17N.2.sl.TZ0.1c.ii: Use your graphic display calculator to estimate the standard deviation of $N$.
• 17N.2.sl.TZ0.1c.i: Use your graphic display calculator to estimate the mean of $N$;
• 17N.2.sl.TZ0.1b.ii: Write down, for $N$, the mid-interval value of the modal class.
• 17N.2.sl.TZ0.1b.i: Write down, for $N$, the modal class;
• 17N.2.sl.TZ0.1a: State whether $N$ is a discrete or a continuous variable.
• 18M.2.sl.TZ1.2e: State, with a reason, whether you would reject the null hypothesis.
• 16M.1.sl.TZ2.7c: State the conclusion of the test. Give a reason for your answer.
• 16M.1.sl.TZ2.7b: A ${\chi ^{\,2}}$ test at the $5\,\%$ significance level is used to determine whether TV...
• 16M.1.sl.TZ2.7a: A survey was conducted among a random sample of people about their favourite TV show. People were...
• 16M.1.sl.TZ1.10d: From the travellers taking part in the survey, 285 were 61 years or older and 420 preferred...
• 16M.1.sl.TZ1.10c: The critical value of this $\chi {\,^2}$ test is $21.026$. Use this information to write...
• 16M.1.sl.TZ1.10b: Find the number of degrees of freedom.
• 16M.1.sl.TZ1.10a: The manager of a travel agency surveyed 1200 travellers. She wanted to find out whether there was...
• 10M.1.sl.TZ1.10a: State the null hypothesis, H0, for this test.
• 10M.1.sl.TZ1.10c: Of the 400 people Tony interviewed, 220 were male and 180 were female. 80 of the people had...
• 10M.1.sl.TZ1.10d: Tony used a 5 % level of significance for his test and obtained a p-value of 0.0634 correct to 3...
• 10M.1.sl.TZ1.10b: Write down the number of degrees of freedom.
• 10M.1.sl.TZ2.9d: State whether the type of coffee drunk is independent of gender. Give a reason for your answer.
• 10M.1.sl.TZ2.9a.i: Write down the null hypothesis.
• 10M.1.sl.TZ2.9b: Write down the number of degrees of freedom for this test.
• 10M.1.sl.TZ2.9c: Write down the critical value for this test.
• 10N.2.sl.TZ0.1B.a: Write down the null hypothesis, H0, for this test.
• 10N.2.sl.TZ0.1B.b: Write down the number of degrees of freedom for this test.
• 10N.2.sl.TZ0.1B.d: Show that the expected number of females that have more than 5 meals per day is 13, correct to...
• 10N.2.sl.TZ0.1B.e: Use your graphic display calculator to find the $\chi _{calc}^2$ for this data.
• 10N.2.sl.TZ0.1B.f: Decide whether H0 must be accepted. Justify your answer.
• 10N.2.sl.TZ0.1B.c: Write down the critical value for this test.
• 12N.2.sl.TZ0.4c: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12N.2.sl.TZ0.4e: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12N.2.sl.TZ0.4f: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12N.2.sl.TZ0.4g: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12N.2.sl.TZ0.4b: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12N.2.sl.TZ0.4d: The manager of the store wants to determine whether the screen size is independent of gender. A...
• 12M.2.sl.TZ1.2d: Write down the critical value of $\chi ^2$, at the 5 % level of significance.
• 12M.2.sl.TZ1.2f: Determine whether H0 should be accepted. Justify your answer.
• 12M.2.sl.TZ1.2a: Write down the null hypothesis, H0, for this test.
• 12M.2.sl.TZ1.2b: Find the expected value of female footballers.
• 12M.2.sl.TZ1.2c: Write down the number of degrees of freedom.
• 12M.2.sl.TZ1.2e: Use your graphic display calculator to determine the $\chi _{calc}^2$ value.
• 12M.1.sl.TZ2.8a: Write down the null hypothesis.
• 12M.1.sl.TZ2.8b: The colours of the cars were red, green, blue, black and silver. Find the number of degrees of...
• 12M.1.sl.TZ2.8c: At the 5 % significance level the $\chi_{calc}^2$ was found to be 8.73. Write down the...
• 11N.2.sl.TZ0.2c: Pam decides to test her belief using a Chi-squared test at the $5\%$ level of...
• 11N.2.sl.TZ0.2d: Write down (i)     the Chi-squared calculated value; (ii)    the number of degrees of...
• 11N.2.sl.TZ0.2e: State, giving a reason, whether there is sufficient evidence at the $5\%$ level of...
• 09N.2.sl.TZ0.4B, c, i: The calculated value of ${\chi ^2}$ is $1.367$ and the critical value of ${\chi ^2}$ is...
• 09N.2.sl.TZ0.4B, a: Write down the total number of male students.
• 09N.2.sl.TZ0.4B, b: Show that the expected frequency for males, whose favourite car colour is blue, is 12.6.
• 09M.1.sl.TZ1.6a: Find the number of degrees of freedom for the $\chi^2$ test.
• 09M.1.sl.TZ1.6b: Write down the null hypothesis for the $\chi^2$ test.
• 09M.1.sl.TZ1.6d: The critical value for the $\chi^2$ test at the 5% significance level is 12.59. The $\chi^2$...
• 11M.2.sl.TZ1.2B.d: A ${\chi ^2}$ test at the $5\%$ significance level was carried out to determine whether...
• 11M.2.sl.TZ1.2B.e: A ${\chi ^2}$ test at the $5\%$ significance level was carried out to determine whether...
• 11M.2.sl.TZ1.2B.f: A ${\chi ^2}$ test at the $5\%$ significance level was carried out to determine whether...
• 11M.2.sl.TZ1.2B.g: A ${\chi ^2}$ test at the $5\%$ significance level was carried out to determine whether...
• 09M.2.sl.TZ2.2i, b: For the number of fertilized plants with height greater than 75 cm, show that the expected value...
• 09M.2.sl.TZ2.2i, c: Write down the value of $\chi_{calc}^2$.
• 09M.2.sl.TZ2.2i, a: Write down the null and alternative hypotheses for this test.
• 09M.2.sl.TZ2.2i, d: Write down the number of degrees of freedom.
• 09M.2.sl.TZ2.2i, f: Is the manufacturer’s claim justified? Give a reason for your answer.
• 11M.2.sl.TZ2.1A.d: Use your graphic display calculator to find the ${\chi ^2}$ test statistic for this data.
• 13M.2.sl.TZ1.1b: Write down the number of degrees of freedom.
• 13M.2.sl.TZ1.1c: Write down the critical value for the test.
• 13M.2.sl.TZ1.1e: Use your graphic display calculator to find for the data (i) the $\chi^2$ calculated value,...
• 11M.2.sl.TZ2.1A.e: State whether Ludmila accepts the null hypothesis. Give a reason for your answer.
• 11M.2.sl.TZ2.1A.c: Find the expected frequency for the females studying Spanish.
• 11M.2.sl.TZ2.1A.b: Write down the number of degrees of freedom.
• 11M.2.sl.TZ2.1A.a: State Ludmila’s null hypothesis.
• 13M.2.sl.TZ1.1a: State the null hypothesis, H0, for the test.
• 13M.2.sl.TZ1.1d: Show that the expected number of Medium Yield crops using Fertilizer C is 17, correct to the...
• 13M.2.sl.TZ1.1f: State the conclusion of the test. Give a reason for your decision.
• 13M.1.sl.TZ2.6a: Write down the null hypothesis.
• 13M.1.sl.TZ2.6b: Find the number of degrees of freedom for this test.
• 13M.1.sl.TZ2.6c: Write down the critical value for this test.
• 13M.1.sl.TZ2.6d: State the conclusion of this test. Give a reason for your decision.
• 07M.1.sl.TZ0.8a: Write a suitable null hypothesis for a $\chi^2$ test on this data.
• 07M.1.sl.TZ0.8b: Write down the value of $\chi^2$ for this data.
• 07M.1.sl.TZ0.8c: The number of degrees of freedom is 4. Show how this value is calculated.
• 07M.1.sl.TZ0.8d: The critical value, at the 5% level of significance, is 9.488. What conclusion can be drawn from...
• SPM.1.sl.TZ0.8a: Find the expected number of female volleyball players under this hypothesis.
• SPM.1.sl.TZ0.8b: Write down the $p$-value for the test.
• SPM.1.sl.TZ0.8c: State, with a reason, the conclusion of the test.
• 07N.2.sl.TZ0.4ii.a: Draw a table with 2 rows and 4 columns of data so that Manuel can perform a chi-squared test.
• 07N.2.sl.TZ0.4ii.c: Find the expected frequency for the number of females who had ‘Comedy’ as their most-watched...
• 07N.2.sl.TZ0.4ii.b: State Manuel’s null hypothesis and alternative hypothesis.
• 07N.2.sl.TZ0.4ii.d: Using your graphic display calculator, or otherwise, find the chi-squared statistic for Manuel’s...
• 07N.2.sl.TZ0.4ii.e: (i) State the number of degrees of freedom available for this calculation. (ii) State his...
• 08N.2.sl.TZ0.3a: Jorge applies a ${\chi ^2}$ test at the $5\%$ level to investigate whether wearing a seat...
• 08M.1.sl.TZ1.5a: Write down the null hypothesis.
• 08M.1.sl.TZ1.5b: Write down the number of degrees of freedom.
• 08M.1.sl.TZ1.5c: Write down the chi-squared value.
• 08M.1.sl.TZ1.5d: State whether or not you will reject the null hypothesis, giving a clear reason for your answer.
• 08M.2.sl.TZ2.2i.c: The market research organization tests the survey data to determine whether the brand of cereal...
• 08M.2.sl.TZ2.2i.d: The market research organization tests the survey data to determine whether the brand of cereal...
• 08M.2.sl.TZ2.2i.e: The market research organization tests the survey data to determine whether the brand of cereal...
• 08M.2.sl.TZ2.2i.f: The market research organization tests the survey data to determine whether the brand of cereal...
• 08M.2.sl.TZ2.2i.g: The market research organization tests the survey data to determine whether the brand of cereal...
• 09N.2.sl.TZ0.4B, c, ii: The calculated value of ${\chi ^2}$ is $1.367$ and the critical value of ${\chi ^2}$ is...
• 09N.2.sl.TZ0.4B, c, iv: The calculated value of ${\chi ^2}$ is $1.367$ and the critical value of ${\chi ^2}$ is...
• 10M.1.sl.TZ2.9a.ii: Write down the alternative hypothesis.
• 14M.1.sl.TZ2.8c: The ${\chi ^2}$ critical value is $7.815$ at the $5\%$ significance level. State whether...
• 14M.1.sl.TZ2.8a: Find the expected frequency for the females who use public transport to get to school.
• 14M.1.sl.TZ2.8b: Find the ${\chi ^2}$ statistic.
• 13N.1.sl.TZ0.8d: The critical value, at the $5\%$ significance level, is $7.815$. State, giving a reason, the...
• 13N.1.sl.TZ0.8a: Write down the null hypothesis for this test.
• 13N.1.sl.TZ0.8b: Write down the number of degrees of freedom.
• 13N.1.sl.TZ0.8c: Write down the value of $\chi _{calc}^2$.
• 14M.1.sl.TZ1.4a: State the null hypothesis.
• 14M.1.sl.TZ1.4b: Write down the number of degrees of freedom.
• 14M.1.sl.TZ1.4c: Write down (i)     the ${\chi ^2}$ statistic; (ii)     the associated p-value.
• 14M.1.sl.TZ1.4d: State, giving a reason, whether the null hypothesis should be accepted.
• 15M.1.sl.TZ2.7a: Write down the null hypothesis for this test.
• 15M.1.sl.TZ2.7b: Write down the observed number of viewers who preferred Rumba and were older than 20 years old.
• 15M.1.sl.TZ2.7c: Use your graphic display calculator to find the $p$-value for this test.
• 15M.1.sl.TZ2.7d: The producer claims that the type of Latin dance a viewer preferred is independent of their...
• 15M.2.sl.TZ1.1a: State (i)     ${{\text{H}}_0}$, the null hypothesis for the test; (ii)    ...
• 15M.2.sl.TZ1.1d: Find (i)     the ${\chi ^2}$ statistic; (ii)     the associated $p$-value for the test.
• 15M.2.sl.TZ1.1e: Determine, giving a reason, whether ${{\text{H}}_0}$ should be accepted.
• 15M.2.sl.TZ1.1b: Write down the number of degrees of freedom.
• 15M.2.sl.TZ1.1c: Show that the expected frequency of those between the ages of 26 and 40 who oppose the reduction...
• 14N.1.sl.TZ0.10d: Minta found that the calculated value of the ${\chi ^2}$ test was 3.576. The critical value at...
• 14N.1.sl.TZ0.10a: State Minta’s null hypothesis.
• 14N.1.sl.TZ0.10b: State the number of degrees of freedom.
• 14N.1.sl.TZ0.10c: 150 students showed a preference for a smoothie. Calculate the expected number of female...